2 /******************************************************************************
4 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
6 *****************************************************************************/
8 /******************************************************************************
12 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
13 * All rights reserved.
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
38 * The above copyright and patent license is granted only if the following
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
73 * 3.4. Intel retains all right, title, and interest in and to the Original
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
81 * 4. Disclaimer and Export Compliance
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
115 *****************************************************************************/
117 #include <contrib/dev/acpica/include/acpi.h>
118 #include <contrib/dev/acpica/include/accommon.h>
120 #define _COMPONENT ACPI_HARDWARE
121 ACPI_MODULE_NAME ("hwsleep")
124 /*******************************************************************************
126 * FUNCTION: AcpiSetFirmwareWakingVector
128 * PARAMETERS: PhysicalAddress - 32-bit physical address of ACPI real mode
133 * DESCRIPTION: Sets the 32-bit FirmwareWakingVector field of the FACS
135 ******************************************************************************/
138 AcpiSetFirmwareWakingVector (
139 UINT32 PhysicalAddress)
141 ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector);
144 /* Set the 32-bit vector */
146 AcpiGbl_FACS->FirmwareWakingVector = PhysicalAddress;
148 /* Clear the 64-bit vector if it exists */
150 if ((AcpiGbl_FACS->Length > 32) && (AcpiGbl_FACS->Version >= 1))
152 AcpiGbl_FACS->XFirmwareWakingVector = 0;
155 return_ACPI_STATUS (AE_OK);
158 ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector)
161 #if ACPI_MACHINE_WIDTH == 64
162 /*******************************************************************************
164 * FUNCTION: AcpiSetFirmwareWakingVector64
166 * PARAMETERS: PhysicalAddress - 64-bit physical address of ACPI protected
171 * DESCRIPTION: Sets the 64-bit X_FirmwareWakingVector field of the FACS, if
172 * it exists in the table. This function is intended for use with
173 * 64-bit host operating systems.
175 ******************************************************************************/
178 AcpiSetFirmwareWakingVector64 (
179 UINT64 PhysicalAddress)
181 ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector64);
184 /* Determine if the 64-bit vector actually exists */
186 if ((AcpiGbl_FACS->Length <= 32) || (AcpiGbl_FACS->Version < 1))
188 return_ACPI_STATUS (AE_NOT_EXIST);
191 /* Clear 32-bit vector, set the 64-bit X_ vector */
193 AcpiGbl_FACS->FirmwareWakingVector = 0;
194 AcpiGbl_FACS->XFirmwareWakingVector = PhysicalAddress;
195 return_ACPI_STATUS (AE_OK);
198 ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector64)
201 /*******************************************************************************
203 * FUNCTION: AcpiEnterSleepStatePrep
205 * PARAMETERS: SleepState - Which sleep state to enter
209 * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
210 * This function must execute with interrupts enabled.
211 * We break sleeping into 2 stages so that OSPM can handle
212 * various OS-specific tasks between the two steps.
214 ******************************************************************************/
217 AcpiEnterSleepStatePrep (
221 ACPI_OBJECT_LIST ArgList;
225 ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep);
228 /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
230 Status = AcpiGetSleepTypeData (SleepState,
231 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
232 if (ACPI_FAILURE (Status))
234 return_ACPI_STATUS (Status);
237 /* Execute the _PTS method (Prepare To Sleep) */
240 ArgList.Pointer = &Arg;
241 Arg.Type = ACPI_TYPE_INTEGER;
242 Arg.Integer.Value = SleepState;
244 Status = AcpiEvaluateObject (NULL, METHOD_NAME__PTS, &ArgList, NULL);
245 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
247 return_ACPI_STATUS (Status);
250 /* Setup the argument to the _SST method (System STatus) */
255 Arg.Integer.Value = ACPI_SST_WORKING;
261 Arg.Integer.Value = ACPI_SST_SLEEPING;
265 Arg.Integer.Value = ACPI_SST_SLEEP_CONTEXT;
269 Arg.Integer.Value = ACPI_SST_INDICATOR_OFF; /* Default is off */
274 * Set the system indicators to show the desired sleep state.
275 * _SST is an optional method (return no error if not found)
277 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL);
278 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
280 ACPI_EXCEPTION ((AE_INFO, Status, "While executing method _SST"));
283 return_ACPI_STATUS (AE_OK);
286 ACPI_EXPORT_SYMBOL (AcpiEnterSleepStatePrep)
289 /*******************************************************************************
291 * FUNCTION: AcpiEnterSleepState
293 * PARAMETERS: SleepState - Which sleep state to enter
297 * DESCRIPTION: Enter a system sleep state
298 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
300 ******************************************************************************/
303 AcpiEnterSleepState (
308 ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo;
309 ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo;
311 ACPI_OBJECT_LIST ArgList;
317 ACPI_FUNCTION_TRACE (AcpiEnterSleepState);
320 if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) ||
321 (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX))
323 ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=%X B=%X",
324 AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB));
325 return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
328 SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
329 SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
331 /* Clear wake status */
333 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
334 if (ACPI_FAILURE (Status))
336 return_ACPI_STATUS (Status);
339 /* Clear all fixed and general purpose status bits */
341 Status = AcpiHwClearAcpiStatus ();
342 if (ACPI_FAILURE (Status))
344 return_ACPI_STATUS (Status);
347 if (SleepState != ACPI_STATE_S5)
349 /* Disable BM arbitration */
351 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1);
352 if (ACPI_FAILURE (Status))
354 return_ACPI_STATUS (Status);
359 * 1) Disable/Clear all GPEs
360 * 2) Enable all wakeup GPEs
362 Status = AcpiHwDisableAllGpes ();
363 if (ACPI_FAILURE (Status))
365 return_ACPI_STATUS (Status);
367 AcpiGbl_SystemAwakeAndRunning = FALSE;
369 Status = AcpiHwEnableAllWakeupGpes ();
370 if (ACPI_FAILURE (Status))
372 return_ACPI_STATUS (Status);
375 /* Execute the _GTS method (Going To Sleep) */
378 ArgList.Pointer = &Arg;
379 Arg.Type = ACPI_TYPE_INTEGER;
380 Arg.Integer.Value = SleepState;
382 Status = AcpiEvaluateObject (NULL, METHOD_NAME__GTS, &ArgList, NULL);
383 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
385 return_ACPI_STATUS (Status);
388 /* Get current value of PM1A control */
390 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
392 if (ACPI_FAILURE (Status))
394 return_ACPI_STATUS (Status);
396 ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
397 "Entering sleep state [S%d]\n", SleepState));
399 /* Clear the SLP_EN and SLP_TYP fields */
401 Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
402 SleepEnableRegInfo->AccessBitMask);
403 Pm1bControl = Pm1aControl;
405 /* Insert the SLP_TYP bits */
407 Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition);
408 Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition);
411 * We split the writes of SLP_TYP and SLP_EN to workaround
412 * poorly implemented hardware.
415 /* Write #1: write the SLP_TYP data to the PM1 Control registers */
417 Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
418 if (ACPI_FAILURE (Status))
420 return_ACPI_STATUS (Status);
423 /* Insert the sleep enable (SLP_EN) bit */
425 Pm1aControl |= SleepEnableRegInfo->AccessBitMask;
426 Pm1bControl |= SleepEnableRegInfo->AccessBitMask;
428 /* Flush caches, as per ACPI specification */
430 ACPI_FLUSH_CPU_CACHE ();
432 /* Write #2: Write both SLP_TYP + SLP_EN */
434 Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
435 if (ACPI_FAILURE (Status))
437 return_ACPI_STATUS (Status);
440 if (SleepState > ACPI_STATE_S3)
443 * We wanted to sleep > S3, but it didn't happen (by virtue of the
444 * fact that we are still executing!)
446 * Wait ten seconds, then try again. This is to get S4/S5 to work on
449 * We wait so long to allow chipsets that poll this reg very slowly
450 * to still read the right value. Ideally, this block would go
453 AcpiOsStall (10000000);
455 Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL,
456 SleepEnableRegInfo->AccessBitMask);
457 if (ACPI_FAILURE (Status))
459 return_ACPI_STATUS (Status);
463 /* Wait until we enter sleep state */
468 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
469 if (ACPI_FAILURE (Status))
471 return_ACPI_STATUS (Status);
475 * Some BIOSs don't set WAK_STS at all. Give up waiting after
476 * 1000 retries if it still isn't set.
483 /* Spin until we wake */
487 return_ACPI_STATUS (AE_OK);
490 ACPI_EXPORT_SYMBOL (AcpiEnterSleepState)
493 /*******************************************************************************
495 * FUNCTION: AcpiEnterSleepStateS4bios
501 * DESCRIPTION: Perform a S4 bios request.
502 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
504 ******************************************************************************/
507 AcpiEnterSleepStateS4bios (
514 ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios);
517 /* Clear the wake status bit (PM1) */
519 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
520 if (ACPI_FAILURE (Status))
522 return_ACPI_STATUS (Status);
525 Status = AcpiHwClearAcpiStatus ();
526 if (ACPI_FAILURE (Status))
528 return_ACPI_STATUS (Status);
532 * 1) Disable/Clear all GPEs
533 * 2) Enable all wakeup GPEs
535 Status = AcpiHwDisableAllGpes ();
536 if (ACPI_FAILURE (Status))
538 return_ACPI_STATUS (Status);
540 AcpiGbl_SystemAwakeAndRunning = FALSE;
542 Status = AcpiHwEnableAllWakeupGpes ();
543 if (ACPI_FAILURE (Status))
545 return_ACPI_STATUS (Status);
548 ACPI_FLUSH_CPU_CACHE ();
550 Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
551 (UINT32) AcpiGbl_FADT.S4BiosRequest, 8);
555 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
556 if (ACPI_FAILURE (Status))
558 return_ACPI_STATUS (Status);
562 return_ACPI_STATUS (AE_OK);
565 ACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios)
568 /*******************************************************************************
570 * FUNCTION: AcpiLeaveSleepState
572 * PARAMETERS: SleepState - Which sleep state we just exited
576 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
577 * Called with interrupts ENABLED.
579 ******************************************************************************/
582 AcpiLeaveSleepState (
585 ACPI_OBJECT_LIST ArgList;
588 ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo;
589 ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo;
594 ACPI_FUNCTION_TRACE (AcpiLeaveSleepState);
598 * Set SLP_TYPE and SLP_EN to state S0.
599 * This is unclear from the ACPI Spec, but it is required
602 Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
603 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
604 if (ACPI_SUCCESS (Status))
607 AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
609 AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
611 /* Get current value of PM1A control */
613 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
615 if (ACPI_SUCCESS (Status))
617 /* Clear the SLP_EN and SLP_TYP fields */
619 Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
620 SleepEnableRegInfo->AccessBitMask);
621 Pm1bControl = Pm1aControl;
623 /* Insert the SLP_TYP bits */
625 Pm1aControl |= (AcpiGbl_SleepTypeA <<
626 SleepTypeRegInfo->BitPosition);
627 Pm1bControl |= (AcpiGbl_SleepTypeB <<
628 SleepTypeRegInfo->BitPosition);
630 /* Write the control registers and ignore any errors */
632 (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
636 /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
638 AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
640 /* Setup parameter object */
643 ArgList.Pointer = &Arg;
644 Arg.Type = ACPI_TYPE_INTEGER;
646 /* Ignore any errors from these methods */
648 Arg.Integer.Value = ACPI_SST_WAKING;
649 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL);
650 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
652 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST"));
655 Arg.Integer.Value = SleepState;
656 Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL);
657 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
659 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _BFS"));
662 Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL);
663 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
665 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _WAK"));
667 /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
671 * 1) Disable/Clear all GPEs
672 * 2) Enable all runtime GPEs
674 Status = AcpiHwDisableAllGpes ();
675 if (ACPI_FAILURE (Status))
677 return_ACPI_STATUS (Status);
679 AcpiGbl_SystemAwakeAndRunning = TRUE;
681 Status = AcpiHwEnableAllRuntimeGpes ();
682 if (ACPI_FAILURE (Status))
684 return_ACPI_STATUS (Status);
687 /* Enable power button */
689 (void) AcpiWriteBitRegister(
690 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId,
693 (void) AcpiWriteBitRegister(
694 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId,
697 /* Enable BM arbitration */
699 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0);
700 if (ACPI_FAILURE (Status))
702 return_ACPI_STATUS (Status);
705 Arg.Integer.Value = ACPI_SST_WORKING;
706 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL);
707 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
709 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST"));
712 return_ACPI_STATUS (Status);
715 ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState)